I recently discovered the Science Studio channel. I watch a lot of TechTube and he has a unique spin (see what I did there?) on the subject. Check this dude out and show him some love with a like or a sub.
Hard drives used to be insanely expensive. In 1984 I had to bring my work IBM PC in to have a 5MB hard drive installed and it was over $2000. My first HDD was a 20MB SCSI that I installed in an IBM PC case with a 2nd floppy and bigger PSU for my Amiga. It cost me $800 and I argued with the salesman for an hour because he was sure it would never work. In the end I had to say "Shut up and take my money."
When I think about IBM loosing out by not keeping their own OS and Hardware to let Intel and Microsoft in.
I think how old and clunky their stuff was in 1983 they shipped PCs with 5 1/4 inch hard drives (thats two cd rom drive form factors) and the same size floppy, at the same time was the 3.5 inch Sony floppy drive and the 3.5 inch Rodime drive was available.
You could get in the ACT Apricot pc smaller hard drive might have been 3.5 inch not sure and the sony floppy.